STTH3012WL STMicroelectronics Diode (Transistor Outline, Vertical) In Stock
STMicroelectronics STTH3012WL is a 1200 V, 30 A ultrafast soft-recovery silicon rectifier diode in a DO-247 through-hole package. With a maximum forward voltage of 2.25 V and ultra-fast soft-recovery characteristics, it suits free-wheeling, boost, and PFC applications in high-voltage power conversion systems.
- Manufacturer
- STMicroelectronics
- Package
- Transistor Outline, Vertical
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- STTH3012WL Datasheet PDF
- Category
- Diode
- Price
- From $1.4435(MOQ 1)
- Temp Range
- ?°C to 175.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 1200 V reverse voltage rating with 30 A forward current capacity enables direct use in 400 V AC mains rectification and 800 V DC bus PFC boost stages
- Ultrafast soft-recovery reverse characteristics minimize switching losses and EMI at frequencies up to 100 kHz, reducing snubber circuit requirements in hard-switched topologies
- Low leakage current and free-wheeling diode optimized construction reduce conduction losses in IGBT half-bridge and full-bridge inverter leg designs
Applications
The STTH3012WL is designed for free-wheeling and output rectification in high-voltage power factor correction (PFC) converters, UPS systems, and industrial motor drive inverters operating from 400 V AC mains. Its 1200 V, 30 A rating and soft-recovery behavior reduce switching transients in IGBT bridge circuits switching at up to 100 kHz, lowering radiated EMI and heat sink requirements. The DO-247 package enables bolt-down mounting to chassis heatsinks for effective thermal management in high-power assemblies.
Specifications
| Factory Lead Time | 25Weeks |
| YTEOL | 6 |
| Additional Feature | FREE WHEELING DIODE, LOW LEAKAGE CURRENT |
| Application | HIGH VOLTAGE ULTRA FAST SOFT RECOVERY |
| Case Connection | CATHODE |
| Configuration | SINGLE |
| Diode Element Material | SILICON |
| Diode Type | RECTIFIER DIODE |
| Forward Voltage-Max (VF) | 2.25V |
| JEDEC-95 Code | DO-247 |
| JESD-30 Code | R-PSFM-T2 |
| Non-rep Pk Forward Current-Max | 210A |
| Number of Elements | 1 |
| Number of Phases | 1 |
| Output Current-Max | 30A |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | FLANGE MOUNT |
| Rep Pk Reverse Voltage-Max | 1200V |
| Reverse Current-Max | 20 µA |
| Reverse Recovery Time-Max | 0.115 µs |
| Reverse Test Voltage | 1200V |
| Surface Mount | NO |
| Terminal Form | THROUGH-HOLE |
| Terminal Position | SINGLE |
| Package | Transistor Outline, Vertical |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8541.10.00.80 |
| Country of Origin | Mainland China |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What switching frequency range is the STTH3012WL optimized for in PFC converter designs?
The STTH3012WL's ultrafast soft-recovery construction is optimized for switching frequencies from 20 kHz to 100 kHz, which covers the majority of transition-mode and continuous conduction mode PFC boost converter operating ranges. Its reverse recovery time is typically below 60 ns, reducing reverse recovery charge (Qrr) and limiting switching losses to under 5 W per device at 50 kHz in a 1200 V, 20 A operating point.
How does the 2.25 V maximum forward voltage of STTH3012WL affect efficiency in a 30 A rectifier stage?
At 30 A forward current, the 2.25 V maximum forward voltage produces a worst-case conduction loss of 67.5 W per device. In a full-wave bridge rectifier carrying 30 A average with two diodes in series, total conduction loss is 135 W maximum. Selecting a lower Vf Schottky diode for the same rating reduces this by approximately 40%, but Schottky devices are limited to 200 V, making the STTH3012WL the practical choice for 1200 V applications where silicon pn-junction forward voltage is the accepted tradeoff.
Which thermal management approach is recommended for the STTH3012WL in continuous 30 A operation?
The DO-247 package of the STTH3012WL has a junction-to-case thermal resistance (RθJC) of approximately 1.0°C/W to 1.5°C/W. At 67.5 W worst-case conduction loss in a 30 A continuous application, a heatsink with thermal resistance below 1.0°C/W is required to keep junction temperature under 150°C at a 40°C ambient. A standard 150 mm x 100 mm aluminum extruded heatsink with a 35 W/°C fan-cooled rating achieves this thermal performance within the DO-247 bolt-down mounting specification.
Related Guides
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
ADAQ7768-1 Design Guide for Precision Vibration and Dynamic Signal Measurement
Design ADAQ7768-1 precision data acquisition channels for vibration and dynamic sensing with the right bandwidth, reference, clock, and layout choices.
Jun 30, 2026
AD5204BRZ10 Design Guide for SPI-Controlled Gain and Offset Calibration
Design AD5204BRZ10 digital potentiometer calibration loops with bounded trim span, safe wiper current, clean SPI routing, and reliable startup codes.
Jun 30, 2026
Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $4.2900 | $4.29 |
| 10+ | $2.7900 | $27.90 |
| 100+ | $2.1900 | $219.00 |
| 1200+ | $1.5542 | $1865.06 |
| 2400+ | $1.4585 | $3500.38 |
| 4800+ | $1.4435 | $6928.61 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”